public Model decodeModel(EngineVersion engineVersion, ILogger log, byte[] data, int startOffset, int length, int texWidth, int texHeight)
{
Model model = null;
if (!modelMap.TryGetValue(startOffset, out model))
{
model = new Model();
model.meshList = new List<Mesh>(1);
model.meshList.Add(VifDecoder.DecodeMesh(log, data, startOffset, length, texWidth, texHeight));
modelMap.Add(startOffset, model);
}
return model;
}
public void WriteObj(String savePath, Model model, WriteableBitmap texture, double scale)
{
string dir = Path.GetDirectoryName(savePath) ?? "";
string name = Path.GetFileNameWithoutExtension(savePath);
// Save the texture to a .png file
using (var stream = new FileStream(Path.Combine(dir, name + ".png"), FileMode.Create))
{
var encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(texture));
encoder.Save(stream);
stream.Flush();
stream.Close();
}
WriteMtlFile(Path.Combine(dir, name + ".mtl"), name);
var objFile = File.Open(Path.Combine(dir, name + ".obj"), FileMode.Create);
var writer = new StreamWriter(objFile);
writer.WriteLine("mtllib " + name + ".mtl");
writer.WriteLine("");
int vStart = 0;
int meshCount = 1;
foreach (var mesh in model.meshList)
{
writer.WriteLine("g Mesh_" + meshCount);
writer.WriteLine("usemtl " + name);
foreach (var vertex in mesh.Positions)
{
writer.WriteLine("v {0} {1} {2}",
FormatDouble(vertex.X / scale),
FormatDouble(vertex.Y / scale),
FormatDouble(vertex.Z / scale));
}
writer.WriteLine("");
foreach (var uv in mesh.TextureCoordinates)
{
writer.WriteLine("vt {0} {1}",
FormatDouble(uv.X),
FormatDouble(1 - uv.Y)); // Flip uv's vertically
}
writer.WriteLine("");
foreach (var vec in mesh.Normals)
{
writer.WriteLine("vn {0} {1} {2}",
FormatDouble(vec.X),
FormatDouble(vec.Y),
FormatDouble(vec.Z));
}
writer.WriteLine("");
for (int i = 0; i < mesh.TriangleIndices.Count-3; i += 6)
{
writer.WriteLine("f {0}/{1}/{2} {3}/{4}/{5} {6}/{7}/{8}",
mesh.TriangleIndices[i] + 1 + vStart,
mesh.TriangleIndices[i] + 1 + vStart,
mesh.TriangleIndices[i] + 1 + vStart,
mesh.TriangleIndices[i + 1] + 1 + vStart,
mesh.TriangleIndices[i + 1] + 1 + vStart,
mesh.TriangleIndices[i + 1] + 1 + vStart,
mesh.TriangleIndices[i + 2] + 1 + vStart,
mesh.TriangleIndices[i + 2] + 1 + vStart,
mesh.TriangleIndices[i + 2] + 1 + vStart);
}
writer.WriteLine("");
vStart += mesh.Positions.Count;
meshCount++;
}
writer.Flush();
writer.Close();
}
